Just how fast is your graphics card?

Published 27 May 2008

Posted by Greg Corke

Article tagged with: hardware, graphics cards, benchmarking, viewperf

SPECviewperf is a worldwide standard for assessing graphics performance. It’s easy to use, freely downloadable and doesn’t require a design software license to run. It uses datasets from a variety of CAD/DCC applications and these are developed by tracing graphics content from actual applications. These include 3ds max, Catia, EnSight, Maya, Pro/Engineer, SolidWorks, UGS NX, and UGS Teamcenter Visualization Mockup.

So what’s this post all about? Well, I’m a bit puzzled about the recent release of the Linux/Unix version of SPECviewperf 10. I understand it has SolidWorks and 3ds Max datasets in it. Now, the last time I looked, neither of those products ran on Linux/Unix, so why include them in a Linux/Unix benchmark?

Putting that rhetorical question to one side for a minute, my point is that the results from SPECviewperf can often be misleading. The benchmark’s scores are broken down by software brand names, but the scores don’t necessarily reflect the performance you’d achieve in the real world application of the same name. Historically, some scores have been known to be off by a huge factor, but I’m pleased to say SPECviewperf 10 is much more accurate than its predecessors - much more accurate, but still not perfect. This is because the graphics card vendors continue to spend precious development time optimizing their drivers to make the benchmark run faster instead of channeling all of their resources to the applications themselves. Why? Well, the clue is in the first line of this post - it’s a ‘worldwide standard’ and gets coverage all over the Internet.

So, what’s the alternative? Well, the SPECapc benchmarks are better as they actually run inside the CAD/DCC application, so the graphics cards vendors can’t optimize their cards as much for these, but the downside is that some benchmarks are quite a bit out of sync with the actual software releases.

Now, don’t get me wrong, I’m not criticizing the Standard Performance Evaluation Corporation (SPEC). I think they do an excellent job in helping guide engineers and designers in decisions on hardware purchases, I’m just saying don’t take the results as gospel.

The only real way to assess how fast a graphics card is to take your own datasets and test them in your CAD/DCC application of choice. The problem is most end users don’t have access to the many different graphics cards, just as most journalists don’t have access to the many different software applications.

So I guess that brings us back to Viewperf 10. Why don’t you download it and let me know what you think. I’d also be interested to hear how you make decisions on hardware purchases, what internal benchmarks you carry out and what you’d like to see us test on DEVELOP3D.

www.spec.org

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Fun with Sketching and Physics

Published 25 May 2008

Posted by Martyn Day

Article tagged with: design, solid edge, siemens plm, synchronous technology, engineer

I found this by accident last year but it dates from 2005. It’s still pretty damn cool if you haven’t ever seen it. One wonders what ever happened to this, it’s surely has a commercial application, even with or without the whiteboard and projector. It would be a great application to have on a Tablet PC, although I can’t say I’ve seen that many Tablet PCs in actual use (the first ones were a little bit crap from memory).

If only all CAD systems were this easy to use and powerful, mind you i think there would be lots of 2D ‘games’ developed with the physics engine by bored engineers and students. If this kind of tool was available in schools surely we would be able to get more kids interested in science?

The system was created using three different technologies:

  • Working Model 2D v.2005
  • Mimio Whiteboard Capture System by Virtual Ink
  • ASSIST sketch understanding system pioneered by MIT Professor Randall Davis

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Solid Edge with Synchronous Technology

Published 23 May 2008

Posted by Al Dean

Article tagged with:

You’ll no doubt have read about the launch of Synchronous Technology from Siemens PLM software. What really matters is how it’s implemented within the company’s products and more specifically how it affects users of Solid Edge. To get to the heart of Synchronous Technology and how it works with Solid Edge we need to look at how Solid Edge has traditionally worked. It’s a feature and history-based modelling system meaning each modelling operation is stored within a history tree. When edits are made, the system needs to recalculate each in turn one after the other, to arrive at the final form. Within that, the system also includes parametric design tools, allowing dimensions, constraints and other driven parameters to control the form of entities within each feature and to cross-link between them. Parameters range from dimension and geometric constraints within a feature sketch, to parameters that define feature extents (such as extrude height, cut depth, or the degrees used in a revolve). You can set-up parameters or constraints that link between features and geometry references using, for example, the “extrude to” option, or offset. Then you can also build parameters that are intelligently driven, referencing other dimensions or measurements.

These are the core components of any Solid Edge model - Features, History, Parameters and Constraints. To confuse things further, you also have a few Direct Editing tools. These allow you to make localised modifications to faces (such as move face) without having to edit the base feature that created that face. These are appended to the end of the history tree and should also be considered to be features (with history). So how does Synchronous Technology change this state of affairs?

Siemens PLM has taken the base technology (namely, Parasolid and D-cubed) within Solid Edge and created a layer on top of the core technologies to extend them. This is the essence of Synchronous Technology and it allows you to work in a much more efficient manner than has traditionally been the case with Solid Edge. But how does it do this exactly?

Synchronous Technology is a feature-based, but history free modelling technology. In other words, it allows you to work with features, enhances the current tools by freeing you from the need to recalculate the history after each edit and adds intelligence to your working process. Let’s dig a little deeper and look at two specific cases - when modelling from scratch and, perhaps more critically to existing users, how you use Synchronous Technology with your existing data.

Modelling from scratch

Synchronous Technology or ST (as we’ll refer to it) allows you to create parts in a very freeform manner. You create a 2D sketch, and then use a set of commands to create the 3D geometry. At present ST is enabled in a select set of operations but the selection of Extrude, Revolve, Hole, Round, Draft, Pattern and Thin Wall (or Shell) is a little deceptive. You need to consider that each enables both the cutting and addition of material in a single feature, and the manner in which you interact and manipulate geometry means that you have much more potential in terms of forms that can be created.

This shows a face being pulled up and a value dialled in, but what’s interesting to note is that the system also takes with it faces that are planar to that selected face (these, of course, can be overridden, so the system doesn’t get too carried away). Also worth noting is that the system maintains the fillet/blend plus the draft angle that’s applied to the outside of the part.

So, you create sketch and the direction in which you drag the arrow defines whether material is added or removed. What enables the freedom is the fact that you are presented with a great deal of feedback about what you’re doing. If you grab a face and move it, you can do it by eye or dial in a specific value, same for rotation. References are created on the fly and the UI widget is useful for moving and rotating geometry in 3D space. Also, when you drag and drop faces, the system works with a set of selection assistants that add intelligence to the process. These are called Live Rules and infer relationships such as tangency, parallelism, concentricity, perpendicularity, symmetry (around a define plane), and radii, between the geometry you select and that around it.

How the system works with concentricity and tangency. The user selects the hole, uses the onscreen widget to move it precisely, but because you also have a concentric condition, the whole bracket stretches. The outer edge maintains its concentricity and the tangency of the swing arm is maintained. Of course, if you just wanted to just move the hole, you toggle off concentricity and just drag and drop it.

But while it’s interesting to play with geometry to get a model into shape, within the design world you always need to be able to tie up specific dimensions and controlling factors - and this is what makes Synchronous Technology unique, for the time being at least. At any point, you can add dimensions or constraints, which can have specific values. These can be between faces, edges and other geometric features, they can be driven or driving, be linked using parametric equations and can reference each other. The point is that you apply them only when they’re needed and they are then maintained. The result is that your interaction with the geometry will respect those constraints and dimensions are maintained and again, all without having to resolve a history tree with each edit. Figure 3 shows a dimension between the centre of a boss and the end of a fixture. As you drag those features, the dimension is maintained, because you’ve defined it. You work with assemblies in a very similar manner, in that you grab, drag and drop, move and rotate faces in multiple parts and the system will calculate the updates automatically. In addition, references can be made between separate parts, cross-referencing faces where required.

This shows how the system works with multiple selections. By selecting the boss and the end face, you can stretch the part as you need to, rather than having to dive in and edit several features right back to the original extrude that created the pipe. What’s absolutely key to note is that at no point are you editing features in a history - you make your edits and the system updates pretty much in real time. 

Working with existing data

Synchronous Technology looks dammed interesting as a modelling technology, but the big question is how does it affect your existing data? Some organisations have been using Solid Edge for over ten years and built up a huge amount of live data, but how can they adopt this new way of working and still maintain that data? The answer is simple: leave it as it is. Solid Edge is now architected to work into two modes. Solid Edge, as standard, with the full range of features and functions that have made it one of the most impressive applications on the market, and then with Synchronous Technology enabled. But you need to be aware of a couple of things.

Firstly, when you open a new part, you have two options. You can either open the part to be built with the traditional feature and history based modelling tools. Or you can use an ST enabled template, which switches on these new tools. More importantly though, what happens if you take an existing part built with a rich history of features that control its design and move it into the Synchronous Technology mode. The answer is thus:

When you open a history-based traditional model as a synchronous part, the system prunes out the history, but retains the information required to maintain the features in a Feature Collection. Siemens is referring to these features as Procedural Features and covering things like chamfers, blends, patterns, and shells. This means you can edit them and the system will maintain the design intent you stored within them. For example, even though a pattern is typically a history-based feature, you can still edit the number of instances within an array or edit the dimensions of a hole using standard hole definition terminology (such as counter sink or counter bore).

This shows a Solid Edge ST part. Dimensions have been placed after the design work has been done, in order to formalise the design intent and lock down dimensions. What’s key is that you can also create the same parametric relationships between dimensions to drive design change as you would within a history and parametric modelling system.

It’s important to note that you can’t really take a part back into the traditional modelling environment once you’ve included ST-based work. If you do, then the system treats it as a bumb solid (and its also worth noting that you can you can put ST parts in a traditional assembly and they will update as need be. These things are key to working out an adoption strategy. Synchronous Technology is brand new. Yes, many of the components have been around for some time, but this is the first time that you’ve been able to combine the flexibility of explicit modelling tools such as CoCreate with the parametric- and feature-based tools within Solid Edge and many others. The fact that the system can solve and handle design change with such ease means many things, but the bottom line is this. If you can affect design change within a part or assembly without having to firstly work out the complex history that gets you to the end result and not have to wait to make those changes, then you’re looking at a radically more efficient product development process.

In conclusion

Synchronous Technology has set tongues wagging across the 3D design world. If you ‘Google’ the term you’ll find endless amount of blogging about it to varying degrees of accuracy and many have tried to pull it apart. What’s been missed to date is that this technology is at a formative stage in development. Yes, you can do a hell of a lot, but you don’t get all those other tools that have been a core part of Solid Edge for the last decade and more within the synchronous technology mode.

This is vitally important; within Solid Edge, you now have two choices: To go synchronous or not. When you do this is down to your projects and even on a part-by-part basis. The benefit you have is that if the ST enabled tools can’t create what you need, you have the last decade’s worth of Solid Edge technology available to do things the traditional way. If you can adopt it and reap the benefits as it makes light work of modelling. But make sure you are aware of the limitations and the impact of moving existing data. The good news is that this technology has huge potential and even at this early stage, it’s clear that Siemens has something unique on its hands.

Further Reading

Evan Yares goes to town on Synchronous Technology. Evan is perhaps one of the few people talking about this technology that really understands what the hell is going on under the hood - worthwhile reading.

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DWG editing goes Web

Published 21 May 2008

Posted by Al Dean

Article tagged with: solidworks, design, autodesk, inventor, collaboration, dwg, interaction design, web

It seems that the battle over the DWG format is still raging - Autodesk claim it’s theirs, others protest. Autodesk tries to copyright and protect it, others protest and to be honest, it’s a battle I’m not really interested in. DWG was an abbrieviation long before the advent of CAD and the copy of BS308 (for those non-brits out there, this is a British Standard for Technical Drawing) proves it - job done.

Anyway, what is interesting is that SolidWorks Labs just launched an online hosted DWG editor called BluePrint Now and it looks pretty slick. With many talking about delivery of CAD over the web, then this is a good indicator of what the first batch of tools will look, feel and smell like. Its built using the Microsoft’s SilverLight technology and the UI is nifty, if a little clunky (as all over the web, CAD apps have been to date). But does it work? I’m going to spend some more time playing with it, but first impressions are that it has some basic tools, lines, circles, arc etc. You can output the drawings as PDF, as DWG again (useful if you’ve made an edit) from AutoCAD R14, right through to the latest rev - or you can email a link to share it with someone.

solidworks_blueprint_blog.jpg

SolidWorks DWG data - works fine - as you would expect.

I did try loading some data, both from Inventor as AutoCAD DWGs and from SolidWorks. The app has a 1Mb file limit, which is going to be pretty quickly hit if you’ve got any data of any size. It loaded the SolidWorks DWGs fine, displayed them after a few hiccups but you could actually pan and zoom the drawing, add some basic detail. Same for the Inventor generated data.

inventor_blueprint_blog.jpg

Inventor DWG file, uploaded to Blueprint Now - seems to work just fine

But this isn’t the point of Labs projects. these things are put out there to show the vendor’s future thoughts - whether they actually reach fruition and become a shipping product remains to be seen. Oh and I just realised two things - Yes, I tried this using Safari and Yes, it works on OSX.

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CoCreate is back with 2008

Published 20 May 2008

Posted by Al Dean

Article tagged with: design, ptc, siemens plm, synchronous technology, cocreate, manage

Things all went a little quiet on the CoCreate front while the PTC acquisition worked its way out and through the system, but that’s done with and the company is pushing its latest release. Today saw the announcement of CoCreate 2008. You’ll notice that the hideous OneSpace Designer Modelling nonsense naming has been dropped. What we’re now dealing with is CoCreate Modelling and CoCreate Model Manager: a much clearer naming convention. What’s also interesting is that the press release mentions “incremental enhancements” that peaked my curiousity so I took a closer look. Updates for this release after the jump:

A) Improved and reworked pattern, that guides the user through the process of creating a pattern features, but also gives you better options for non-uniform patterns and selective suppression of specific instances.

B) Shaded and rendered drawing views

C) You can now capture work-in-progress and this is an interesting one. By allowing the user to save daily work and “what if” scenarios, even when you have multiple revisions of locked parts and assemblies loaded into your session. This type of thing will save that, end of day – “Who the eff locked out my parts, I want to go home?” problem that many PDM users will be familiar with.

Modelling updates

With the recent interest in Direct Editing, Explicit Modelling, Push me Pull me modelling technology, its also no wonder that PTC are making some noise (if a little subdued) about the modelling tools in CoCreate. This release sees some enhancements made to cross-sectional modification and there’s some new surface editing, which allow you to maintain curvature tangency, coincidence, and continuity.

Considering the noise that Siemens are going to make this week with the dual-headed launch of Solid Edge and NX with Synchronous Technology, this release is perfect timing. CoCreate 2008 is scheduled to be available in May 2008 in English, French, German, Italian, Japanese and Spanish.

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Sky is the limit for new product design

Published 17 May 2008

Posted by Martyn Day

Article tagged with: design, rendering, visualisation, art-vps

I’m always interested in new forms of transport and thanks to modern product design systems, new materials and a few determined inventors inability to limit their imaginations. The recent BBC news piece on Swiss ‘mentalist’ Yves Rossy’s home made rocket pack really is something else. Basically, the guy leaps out of a plane, his 3 metre wing unfolds and his four rockets ignite and off he goes. He has soared to heights of 8,000 metres at speeds over 100 knots. It’s probably not surprising that Rossy is an ex-military jet fighter pilot and commercial pilot, so he knows a lot about flying. It’s absolutely amazing and normally the kind of thing that’s mentioned in a conversation about the Darwin Awards, where some idiot has removed themselves from the gene-pool by doing something absolutely stupid and deadly, like attaching a rocket to their back, igniting it and flying into the ground.

It seems that he was formerly known as Jet-man but a sponsorship deal with Hublot watches meant he became Fusion-man to coincide with a watch name. Still, hey, you can’t blame him, the damn thing cost about $300,000 to develop.

Mr. Rossy’s madness led me to search for some more you tube fun. Looking for Swiss Rocket-man I found some chap who’d attached a rocket to his bicycle, reaching a speed of 242 Kmph, which is actually faster than Mr. Fusion-man’s rocket glider. The video doesn’t show how he actually managed to brake but we guess he survived. There is something weird happening in Switzerland, seems they will strap a jet engine to anything that blatantly shouldn’t!

I also found an actual new product, the world’s smallest helicopter. The Gen H-4, from Gene Corporation, costs about $32,000 and has two, 4 metre coaxial, contra_rotating rotors which eliminates the need for a tail rotor. The four 125cc 2 cylinder engines use standard petrol. The Gen H-4 can fly up to 1000 metres, at 59 mph for up to 30 minutes. It’s really impressive but I’m not sure about nipping to the shops in it.

You can’t have a round-up of ‘Jetsons’ flying vehicles without talking about Moller. The company has two flying cars in development. The two seater M200D Volantor is a round, space-ship like platform that can vertically take off and land and costs around $125,000. The ship is software limited to fly at 10 ft and uses 8 Moller’s Rotapower engines and Rotafan ducted fan for lift and propulsion, although the maximum payload is 250 lbs. I think this is the one i would choose for myself as it does have the air of a Marvel comic baddie vehicle. The M200D is a prelim to Moller’s other big design, the SkyCar.

and the Skycar:

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3D without glasses

Published 16 May 2008

Posted by Greg Corke

Article tagged with:

The first time I used a 3D monitor was at the end of the nineties. The problem was that to see the 3D image clearly I had to sit directly in front of the screen and even then it gave me an absolutely massive headache. With Philips’ new WOWvx 3D display you don’t have to sit directly in front of the screen and it doesn’t give you a massive headache. Now why didn’t the guys who developed my old 3D monitor think of that? To think how much paracetamol I could have saved.

Helping turn its WOWvx 3D technology into something ‘real’, the boffins at Phillips have teamed up with London’s Picture Production Company Group (PPC). The London-based outfit has plenty of expertise in turning 2D into 3D and is supplying media content for the displays. The major focus at PPC is currently on product marketing, but beyond turning heads in your local high street or car showroom, this technology has the potential to become an essential tool for the product development process.

Indeed, PPC told DEVELOP3D that they already have a motor manufacturer who is using this technology to revisit legacy 2D drawings, but is also considering putting the screens on designer’s desks for a true 3D modelling experience. Skipping industries, Dutch architects, OMA, is using the technology to bring its buildings to life for design exploration and client presentations.

In terms of producing the 3D imagery Philips explained that 2D video can be converted into 3D using a rather clever box of tricks called the Philips BlueBox. However, if a 3D CAD model exists, it can be adapted for the screen by taking it into 3ds Max and Maya and using special plug ins to produce the ‘2D plus depth’ file required for the display. It would also be possible to develop plug ins for other CAD applications.

Anyway, to learn more about the technology I’ve included the obligatory YouTube link. The problem is you kind of lose the effect a bit watching it on a 2D monitor. It’s a bit like watching R2D2’s Princess Leia hologram on the silver screen. OK, it’s not, but you get my point.

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